Re: [PATCH 8/8] powerpc/mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE

On Mon, May 11, 2026 at 04:05:36PM +0200, David Hildenbrand (Arm) wrote:
> register_page_bootmem_info_node() essentially only calls
> register_page_bootmem_memmap(). However, on powerpc that function is a
> nop. So there is not benefit in using CONFIG_HAVE_BOOTMEM_INFO_NODE
> anymore, let's just drop it.
> 
> We can stop including bootmem_info.h.
> 
> Signed-off-by: David Hildenbrand (Arm) <[email protected]>

Reviewed-by: Mike Rapoport (Microsoft) <[email protected]>

> ---
>  arch/powerpc/mm/init_64.c | 8 --------
>  mm/Kconfig                | 2 +-
>  2 files changed, 1 insertion(+), 9 deletions(-)
> 
> diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
> index b6f3ae03ca9e..64f0df5bb5cd 100644
> --- a/arch/powerpc/mm/init_64.c
> +++ b/arch/powerpc/mm/init_64.c
> @@ -41,7 +41,6 @@
>  #include <linux/libfdt.h>
>  #include <linux/memremap.h>
>  #include <linux/memory.h>
> -#include <linux/bootmem_info.h>
>  
>  #include <asm/pgalloc.h>
>  #include <asm/page.h>
> @@ -388,13 +387,6 @@ void __ref vmemmap_free(unsigned long start, unsigned long end,
>  
>  #endif
>  
> -#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
> -void register_page_bootmem_memmap(unsigned long section_nr,
> -				  struct page *start_page, unsigned long size)
> -{
> -}
> -#endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
> -
>  #endif /* CONFIG_SPARSEMEM_VMEMMAP */
>  
>  #ifdef CONFIG_PPC_BOOK3S_64
> diff --git a/mm/Kconfig b/mm/Kconfig
> index e221fa1dc54d..97b079372325 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -537,7 +537,7 @@ endchoice
>  
>  config MEMORY_HOTREMOVE
>  	bool "Allow for memory hot remove"
> -	select HAVE_BOOTMEM_INFO_NODE if (X86_64 || PPC64)
> +	select HAVE_BOOTMEM_INFO_NODE if X86_64
>  	depends on MEMORY_HOTPLUG
>  	select MIGRATION
>  
> 
> -- 
> 2.43.0
> 

-- 
Sincerely yours,
Mike.